Pith Number

pith:BZ7DUMEV

pith:2026:BZ7DUMEV7NERRSSCFNUT34DUYP

not attested not anchored not stored refs resolved

ALMA Band 2 line survey of a $z = 3.44$ clumpy strongly-lensed submillimetre galaxy

Tom J. L. C. Bakx

ALMA Band 2 observations of a lensed galaxy at z=3.44 detect multiple molecular lines that trace highly excited dense gas bathed in intense far-ultraviolet radiation.

arxiv:2604.01089 v2 · 2026-04-01 · astro-ph.GA

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\usepackage{pith}
\pithnumber{BZ7DUMEV7NERRSSCFNUT34DUYP}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

The CO spectral line energy distribution and [CI]/CO line ratios indicate highly excited, dense molecular gas with a strong far-ultraviolet radiation field. The dense gas fraction is estimated at 17 ± 9 per cent.

C2weakest assumption

The interpretation of line ratios as tracers of excitation and density assumes that differential lensing and beam-filling factors do not significantly alter the observed line ratios across the 76-111 GHz band.

C3one line summary

ALMA Band 2 observations of SPT-S J002706-5007.4 at z=3.44 detect multiple molecular lines indicating highly excited dense gas and demonstrate the band's utility for high-redshift spectroscopy.

References

2 extracted · 2 resolved · 0 Pith anchors

[1] Physics and Chemistry of Star Formation: The Dynamical ISM Across Time and Spatial Scales , year = 2023, editor = 2014 · doi:10.48550/arxiv.2211.00195

[2] Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumenta- tion for Astronomy XI. p. 121900K, doi:10.1117/12.2629766 Hughes D. H., et al., 1998, Nature, 394, 241 Imanishi M., Nakanishi K., 1998 · doi:10.1117/12.2629766

Formal links

2 machine-checked theorem links

Cited by

1 paper in Pith

SDSS+JWST Census of Stellar and Nebular Dust Attenuation at $z \sim 0$-7: Mass Dependence and Redshift Evolution

Receipt and verification

First computed	2026-05-20T00:00:37.400116Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0e7e3a3095fb4918ca422b693df074c3fe698482be7bc2745dd3115ca5e8b0f0

Aliases

arxiv: 2604.01089 · arxiv_version: 2604.01089v2 · doi: 10.48550/arxiv.2604.01089 · pith_short_12: BZ7DUMEV7NER · pith_short_16: BZ7DUMEV7NERRSSC · pith_short_8: BZ7DUMEV

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/BZ7DUMEV7NERRSSCFNUT34DUYP \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 0e7e3a3095fb4918ca422b693df074c3fe698482be7bc2745dd3115ca5e8b0f0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "49f14ee587d2c4b3640f8fed705f44d10b687931d0533a13c34fa28c7ce30108",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "astro-ph.GA",
    "submitted_at": "2026-04-01T16:16:21Z",
    "title_canon_sha256": "22def44a47e607f74c9655c32103abd51d80a24cba3eaa106bb604fa30a32e3a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.01089",
    "kind": "arxiv",
    "version": 2
  }
}